81508720

素因数分解:

$2^4\times 5^1\times {\mathrm{1018859}}^1$

素因数の和:1018872

約数の個数: 20

約数和(自身を含む): 189507960

約数和(自身を除く): 107999240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018859, 2037718, 4075436, 5094295, 8150872, 10188590, 16301744, 20377180, 40754360, 81508720]

約数ペア:

[(1, 81508720), (2, 40754360), (4, 20377180), (5, 16301744), (8, 10188590), (10, 8150872), (16, 5094295), (20, 4075436), (40, 2037718), (80, 1018859)]